<script setup>
import { User, Lock } from '@element-plus/icons-vue'
import { ref, watch } from 'vue'
import { userRegService, userLoginService } from '@/api/user'
import { ElMessage } from 'element-plus'
import { useUserStore } from '@/stores/index'
import { useRouter } from 'vue-router'
const isRegister = ref(true)
const form = ref()

// 用于提交的form数据对象
const fromModel = ref({
  username: '',
  password: '',
  repassword: ''
})
// 整个表单的检验规则
// 1.非空校验 required: true message消息提示，trigger触发校验的时机 blur change
// 2.长度检验 min:xx max:xx
// 3.正则校验 pattern:正则规则 /S 非空
// 4.自定义校验 自定义函数
// validator: (rule, value, callback)
// (1) rule 当前校验规则相关的信息
// (2) value 所检验的表单元素目前的表单值
// (3) callback 回调
//  callback() 检验成功
// clallback(new Error(错误信息)) 检验失败
const rules = {
  username: [
    { required: true, message: '请输入用户名', trigger: 'blur' },
    { min: 5, max: 10, message: '用户名必须为5~10位的字符', trigger: 'blur' }
  ],
  password: [
    { required: true, message: '请输入密码', trigger: 'blur' },
    {
      pattern: /^\S{6,15}$/,
      message: '密码必须为6~15位的非空字符',
      trigger: 'blur'
    }
  ],
  repassword: [
    { required: true, message: '请输入密码', trigger: 'blur' },
    {
      pattern: /^\S{6,15}$/,
      message: '密码必须为6~15位的非空字符',
      trigger: 'blur'
    },
    {
      validator: (rule, value, callback) => {
        // 判断value 和 当前 form 中收集的 password 是否一致
        if (value !== fromModel.value.password) {
          // 不一致 检验失败
          callback(new Error('两次输入的密码不一致'))
          return
        }
        callback()
      }
    }
  ]
}
// 注册
const register = async () => {
  // 注册之前，先进行校验
  await form.value.validate()
  // 成功就会执行到这里 注册
  await userRegService(fromModel.value)
  // 注册成功
  ElMessage.success('注册成功')
  // 切换登录
  isRegister.value = false
}

// 监视登录注册 状态
watch(isRegister, () => {
  // 清空输入框值
  for (const key in fromModel.value) {
    fromModel.value[key] = ''
  }
})
// 登录
const userStore = useUserStore()
const router = useRouter()
const login = async () => {
  // 注册之前，先进行校验
  await form.value.validate()
  const { username, password } = fromModel.value
  const res = await userLoginService({ username, password })
  console.log(res)
  // 本地持久化
  userStore.setToken(res.data.token)
  ElMessage.success('登录成功')
  // 跳转主页面
  router.push('/')
}
</script>

<template>
  <!-- 
校验相关
      绑定的整个form的数据对象 xxx，xxx，xxx
      绑定的整个rules规则对象 [ xxx，xxx，xxx
      (2)
      (3) 表单元素 => v-model="ruleForm.xxx"
      给表单元素，绑定form的子属性
      (1) el-form => :model="ruleForm
      el-form => :rules="rules"
      (4) prop配置生效的是哪个校验规则
   -->
  <el-row class="login-page">
    <el-col :span="12" class="bg"></el-col>
    <el-col :span="6" :offset="3" class="form">
      <!-- 注册 -->
      <el-form
        :model="fromModel"
        :rules="rules"
        ref="form"
        size="large"
        autocomplete="off"
        v-if="isRegister"
      >
        <el-form-item>
          <h1>注册</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input
            v-model="fromModel.username"
            :prefix-icon="User"
            placeholder="请输入用户名"
          ></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            v-model="fromModel.password"
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入密码"
          ></el-input>
        </el-form-item>
        <el-form-item prop="repassword">
          <el-input
            v-model="fromModel.repassword"
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入再次密码"
          ></el-input>
        </el-form-item>
        <el-form-item>
          <el-button
            @click="register"
            class="button"
            type="primary"
            auto-insert-space
          >
            注册
          </el-button>
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = false">
            ← 返回
          </el-link>
        </el-form-item>
      </el-form>
      <el-form
        :model="fromModel"
        :rules="rules"
        ref="form"
        size="large"
        autocomplete="off"
        v-else
      >
        <el-form-item>
          <h1>登录</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input
            v-model="fromModel.username"
            :prefix-icon="User"
            placeholder="请输入用户名"
          ></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            v-model="fromModel.password"
            name="password"
            :prefix-icon="Lock"
            type="password"
            placeholder="请输入密码"
          ></el-input>
        </el-form-item>
        <el-form-item class="flex">
          <div class="flex">
            <el-checkbox>记住我</el-checkbox>
            <el-link type="primary" :underline="false">忘记密码？</el-link>
          </div>
        </el-form-item>
        <el-form-item>
          <el-button
            @click="login"
            class="button"
            type="primary"
            auto-insert-space
            >登录</el-button
          >
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = true">
            注册 →
          </el-link>
        </el-form-item>
      </el-form>
    </el-col>
  </el-row>
</template>

<style lang="scss" scoped>
.login-page {
  height: 100vh;
  background-color: #fff;
  .bg {
    background:
      url('@/assets/logo2.png') no-repeat 60% center / 240px auto,
      url('@/assets/login_bg.jpg') no-repeat center / cover;
    border-radius: 0 20px 20px 0;
  }
  .form {
    display: flex;
    flex-direction: column;
    justify-content: center;
    user-select: none;
    .title {
      margin: 0 auto;
    }
    .button {
      width: 100%;
    }
    .flex {
      width: 100%;
      display: flex;
      justify-content: space-between;
    }
  }
}
</style>
